Levi b



(N0 Mantel.)

B. START.

muss. y

Patented Apr. 1-0, 1888,

4 -UNITED STATES 'PME1 IT1 OF CE,

nnvr B. STUART, OF

snnronn, GONNEOTIGUT, ASSIGNORFONE-HALE ro W. E. nonnnrs, OB SAME PLAGE7 TRUSS.

SPECIEICATION forming part of-Letteis Patent N0. ss1,oa9, a;;wa April10, was.

Applicatioxifiiod Decefnber 20,187. Seria1'No.58,482. (]}fo model.)

T all wiwm itjnay concern:

Be it known that I, LEVIB. START, of Seymour, in the county of New Havenanti Stehe of Connecticut, have invented a new Improve- 7 1 5 ment in'lrusses; and I do hereby declare the following, when haken ineonneotion withyaccompanying drawings and the letters of referencemarked thereon, to be a full, clear, and exa-ct desoription of ehesaure, and which seid drawings constitute pa.rt of this specifioation,and representa, in Figure 1, an o utside or front view of the pa'd n.ndsomuch of the fraime as is neeessary to 1llusrafie the invention; Fig.2, a side view of the pad, looking toward the forward end of the frame;Fig. 3, a vertaica.l secbion throngh the frame and parbial section ofthepad, illustrating the conneetion of the spring with the frame andpad; Fig. 4, a to.p view of the pad and frame; Fig 5, the springdetached.

This invention relates 110 an improvement in trusses, having speeialreference b o the attac h menbof the p'ad to b he frarz1e, the object ofthe invention being to give l;o the pad a self-adjustable bear-ing or1ifting acbion; and ib cousists in a pad hung to the frame as upon ahinge, With a spring-pressure between the frame and pad below lshehinge, the tendenoy of whiczh spring is 120 turn tshe body upon thehinge and give t;o the body an upward lifting aotion 01 pressure.

In ilhdstrating the invention Lshow the framesubstantialiy such asillustfated in Pab ent No. 237,926, granted for my inventiori February15, 1881, but only show the front porbion of the frame 120 which thebody is atbached, that being snffioient for Ehe illustration of theinvention.

A A represenb the two wires which form the' frame,but which areconnectedby a bend, B, at the extreme forward end of the fran1e.

0 represents the pad, whioh will be of a shape according 130circumstanoes and es in other consbructions of truss. The pad is hinged110 the frame. The p0inb of hinging upper bar of the frame, and so thatthe bar itbetween the' frame anti pad being below the seif forms apino1e or support for the spring. Thespring is made from a single-pieoeof wire, the porti0n of the Wire between the Wo parts D Dof the springbeing bent into U 1 shape, as seei1in Fig. 5, E representing theU-shaped po'rtion of.the spring; This U- shapecl portion eXtends downonto t;hep;d, as

repres"ented in Figs. 2 and 3, and so as totake a firm b'earingthereon.(Ehe extreme endsof bhespring are made fast to the frani'ia, as hererepresentei This is doiie byex trnding the 1egs 170 the 1ower parb oftheframeand bend-' ing the ends around thabpart of the frame, as Jrepresentsed ab a a, Fig. 1. The relation of the per]: E of the spring110 the fixed legs go is suoh as t0 g ive ohe pad an in'clination so theframe- Uhat is, so thab bhe pad standsaway from the 1ower part of v theframe, bot is yieidirigly hold by thespring, so that pressure uponthebody may force the pad toward the frame, as indi cated in brokenlines, Fig. 2.

TheSpring is best secured to the frame by a p1ate, F, one end of-whiehis bent arouixd the npper part of the franne,as ab G, and, ex-

tending downvi ardinclosesthe parb E of the spring, a.nd 1s secured 130tqhe pad by'a sorew, H, whi0h forms a pivot on which the'pad maybeperinitted a limitd amount of oseil-lation to give i t| be requiredtransversepositiom A yoke, I, is att-aehed by its.upper end to the Sopad above the frame, as als b, 'the yoke extending outside the frarne,thence down to. the

body below he pivots, where the 1ower end of the yoke isadjustabiyseeured 110 the pad, as

at d, this adjusbarbility being produeed by means of a*screw e, whichmay be sorewed into orwitahdrawn from the pad,.so asto give a greater orless amounta of play for the pad.

The yoke comes' 110 a bearing up0n the frrne nn der the aobion 0f thespring, es represented d in Fig. 3, which limits the extenb of rise,

swing, or upwa1*d1iftwhieh m a'y be imparted 110 the pad, .and bhisextenh of movemerit may be adjusted by means of the serew e. Nor mally,however, should be such fihat the pad will rest o.n the person withoutsub'stanbizmi eontacbof the 'yoke, and so that the pressure Willalwayslb yield- 1ng.

The action of the spring upon bhe pad. is 110 rooi the adjustmrant'ofthe yoke give ib an upward Lift or pressure-an effect which is desirablein this dass 0f trusses; bat: ab the same time it permits the pad 130yield under the movements of the body, so that it Will a1ways retain thsame relative position to the parts so which ib is applied.

It Will be evident that while the yoke is desirable, in order to lin1itthe extreme upward lift; of the pad, it is not: essentsial 150 theinvention and may be omitted.

l. A frame eomposed of tw0 parts, A JA, united at; the forward end, thepad O, hinged to the upper part A of ehe frame, the pad extendingdownward therefrom, wibh a helical spring surrounding the upper pa.rt 0fthe frame as a pinble, the end 0f the spring made fast to the saidframe, the spring constructed With an extension 01 arm downward from thecoils 0nto the pad below the frame, substantially as described, the saidspring operabing to turn the body npward from the lower part; of theframe and give t0 it a lifting action.

2. 'lhe combination of a frame composed 0f two parts, A A, a pad hingedto the upper part of the frame, a spring betsween the frame and pad tooperate npon t;he body of said pad below the hinge, and a yoke, I,outzside the frame, the yoke secured ab its upper end to t;he pad bothabove and below the frame, the said yoke serving to limit the extent ofthe 1ift1ing actsion 0f the pad, substantially as described.

J OHN L. SOMES, LIFFORD J. ATWATER.

